/// <summary>
/// Retrieves a token from the server, and decrypts it.
/// </summary>
/// <param name="passphrase">The passphrase to use to decrypt the client key.</param>
/// <returns>The decrypted token.</returns>
private async Task <GpgAuthToken> GetAndDecryptToken(SecureString passphrase)
{
var auth = new Dictionary <string, dynamic>
{
{ "gpg_auth", new Dictionary <string, dynamic>
{
{ "keyid", _clientKey.Fingerprint },
} }
};
var result = await _session.Post(URL_LOGIN, auth).SendAsync();
GpgAuthHeaders.Validate(result.Response.Headers, GpgAuthState.DecryptToken);
// Decrypt the token
var encrypted = result.Response.Headers.GetValue("X-GPGAuth-User-Auth-Token");
var decoded = WebUtility.UrlDecode(encrypted.Replace("\\+", " "));
var decrypted = await _pgp.DecryptStringAsync(decoded, _clientKey, passphrase);
// Validate the token
var token = new GpgAuthToken(decrypted);
return(token);
}